import java.util.Scanner;

public class MyDCTest {

    public static void main (String[] args) {

            String expression, again;

            int result;

           try
            {
                  Scanner in = new Scanner(System.in);

                  do
                     {
                        MyDC evaluator = new MyDC();
                      System.out.println ("Enter a valid postfix expression: ");
                        expression = in.nextLine();

                        result = evaluator.evaluate (expression);
                        System.out.println();
                        System.out.println ("That expression equals " + result);

                        System.out.print ("Evaluate another expression [Y/N]? ");
                        again = in.nextLine();
                        System.out.println();
                    }
                 while (again.equalsIgnoreCase("y"));
               }
           catch (Exception IOException)
           {
                  System.out.println("Input exception reported");
               }
          }
 }